If you don't vote, can you complain about the government?
Not voting is like being in a bar, not saying what you want, and then complaining about what you get.
If you look at the real results of the last election, you'll see that if just some of those non-voters vote, any result is possible.
If we vote, independent-minded candidates and small parties can win seats and have a real influence.
Just a few strong and independent-minded MPs can force public debate and challenge the legitimacy and the decisions of a future elected government.
They can help to protect us from the ideological stupidity of the leading party.
They can stop the government blaming their own mess on the immigrants and working people who cannot reply.
So if there is a candidate who you trust to work hard for things you believe in, vote for them. They need your support.
If good people who believe in justice and a fair society don't vote, then others choose our government.
Those who vote just in their own self-interest usually vote. But they vote for a government to work in their interest, not yours.
'All that is necessary for the triumph of evil is for good men to do nothing.'
Edmund Burke 1729 ‑ 1797
Why vote Green? Why vote Liberal Democrat Lib Dem? Why vote Labour? Why vote UKIP? Why vote Conservative? Why vote SNP? Why vote Plaid Cymru?
They have different histories and policies that are not always clear from the manifestos. To find out, talk to people you respect, read some independent newspapers, listen to the candidates and leaders, and critically review the manifestos and party websites.